On Surface Topography and Microstructure in Cavitation Erosion Tests of Alloy 80 A

7th International Conference on Advanced Materials and Structures

Belin, C.^1 ; Mitelea, I.^1 ; Bordeasu, I.^1 ; Craciunescu, C.^1

Politehnica University of Timisoara, Timisoara, EU, Romania^1

关键词: Cavitation erosion resistance;    Electronic scanning microscopy;    Microstructural changes;    Nimonic 80A;    Piezoceramic;    Selection of materials;    Vibrating devices;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/416/1/012010/pdf
DOI  :  10.1088/1757-899X/416/1/012010

来源: IOP

【 摘 要 】

From practical and economic reasons for the design of components for Diesel engines, the selection of materials and/or heat treatments is essential to provide a high cavitation erosion resistance. This paper studies cavitation behavior of the Nimonic 80A alloy designed for execution of Diesel engine exhaust valves. The cavitation tests where done on an ASTM G32 -2010 compliant vibrating device with piezoceramic crystals. The metalographic examinations performed with optical microscope and electronic scanning microscopy revealed the microstructural changes occurring in the region of the cavitation affected material and the path of the crack propagation.